Table 5.3 Indicative project characteristics offshore Parameter
Capacity Number of wind turbines
East Anglia THREE area (offshore) Water depth
Distance from East Anglia THREE to shore (closest point of site to Lowestoft)
Maximum offshore cable corridor length Maximum offshore cable corridor area
Number of export cables (HVDC) Proposed turbine capacity
Turbine rotor diameter (maximum) Hub height (maximum) Tip height (maximum)
Minimum clearance above sea level Top of platform
Indicative minimum separation between turbines
Number of wind turbinemodels Wind turbine foundation type options Number of metmasts
Height of metmasts (maximum) Met mast foundation type options
Offshore substation
Characteristic 1,200MW
100 - 172 units 305km2
Generally <45m but up to 49m 69km 155km
838km2 (note for final ES the area of interconnection will be added)
Up to 4 7 - 12MW 154 – 220m
101.5 – 135.5 (LAT) 102 - 136m(MSL) 181 - 247m(LAT) 181.5 – 247.5 (MSL) 22m (MHWS)
Up to 14m (LAT) 14.5m (MSL
In row spacing 675m Inter-row spacing 900m Up to 3
Jackets, gravity base structures, suction caissons,monopiles
Up to 2 150m(LAT) 150.5 (MSL)
Jacket, gravity base, suction caisson or monopile
Minimum 1 HVDC converter station and 2 HVAC collector stations
Maximum 2 HVDC converter station and 3 HVAC collector stations
Accommodation platform LIDAR Buoy
One Up to two
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 5 Description of the Development Page 7
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